What is alt in html img tag?

 The alt attribute in an HTML img tag is used to provide alternative text for an image. This text is displayed when the image cannot be displayed, such as when the image is missing or the user has disabled images in their browser. The alt attribute is also used by screen readers to provide a description of the image to visually impaired users.

Here is an example of how to use the alt attribute:

HTML

<img src="image.jpg" alt="A red apple">

コードは慎重に使用してください。詳細

In this example, the alt attribute is set to "A red apple". This means that if the image "image.jpg" cannot be displayed, the text "A red apple" will be displayed in its place. This will help users to understand the content of the image, even if they cannot see it.

It is important to use descriptive alt text for all images in your HTML documents. This will make your website more accessible to all users, and it will also help you to improve your SEO (search engine optimization).

Here are some tips for writing good alt text:

• Be concise and to the point.
• Use keywords that are relevant to the image.
• Write in a natural, conversational style.
• Avoid using generic phrases like "image" or "picture".

By following these tips, you can write alt text that is both informative and helpful.